Exergy and Exergoeconomic Model of a Ground-Based CAES Plant for Peak-Load Energy Production

Energies

Francesco Buffa²  Simon Kemble²  Giampaolo Manfrida¹ 

[1] Università degli Studi di Firenze, Dipartimento di Ingegneria Industriale, Firenze, Italy; E-Mail:;GE Oil & Gas Nuovo Pignone SrL, Firenze, Italy; E-Mails:

关键词: Compressed Air Energy Storage (CAES);    exergy;    exergoeconomics;    thermoeconomics;   

DOI  :  10.3390/en6021050

来源: mdpi

【 摘 要 】

Compressed Air Energy Storage is recognized as a promising technology for applying energy storage to grids which are more and more challenged by the increasing contribution of renewable such as solar or wind energy. The paper proposes a medium-size ground-based CAES system, based on pressurized vessels and on a multiple-stage arrangement of compression and expansion machinery; the system includes recovery of heat from the intercoolers, and its storage as sensible heat in two separate (hot/cold) water reservoirs, and regenerative reheat of the expansions. The CAES plant parameters were adapted to the requirements of existing equipment (compressors, expanders and heat exchangers). A complete exergy analysis of the plant was performed. Most component cost data were procured from the market, asking specific quotations to the industrial providers. It is thus possible to calculate the final cost of the electricity unit (kWh) produced under peak-load mode, and to identify the relative contribution between the two relevant groups of capital and component inefficiencies costs.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.